Teigha.GraphicsSystem.Device Error

I tried to run the code in the blog below, but I get a 'System.AccessViolationException' error at dev.Add (view); (Line 140)
In AutoCAD it runs fine.
Is there any workaround?
https://through-the-interface.typepad.com/through_the_interface/2007/04/taking_a_snapsh_1.html

Comments

  • [CommandMethod("TESTDEV", CommandFlags.Modal)]
    public void TestDevice()
    {
        Document document = Application.DocumentManager.MdiActiveDocument;
        Manager manager = document.GraphicsManager;
        using Device device = manager.CreateAutoCADOffScreenDevice();
        using View view = device.CreateView();
        device.Add(view);
        device.OnSize(new Size(800, 600));
        var p0 = new Point3d(0, 0, 0);
        var p1 = new Point3d(200, 200, 0);
        using (var line = new Line(p0, p1) {ColorIndex = 2, LineWeight = LineWeight.LineWeight000})
        {
            view.Add(line);
        }
        view.ZoomExtents(p0, p1);
        device.Update();
        using (Bitmap bitmap = view.GetSnapshot(new Rectangle(0, 0, 800, 600)))
        {
            bitmap.Save(@"C:\Temp\1.png");
        }
    }
    
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